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We make your perfect water.
Heat transfer fluids

coracon® antifreeze products for heating systems
Temperature-stable. Environmentally friendly. Safe.

Adding antifreeze products is often unavoidable to avoid frost damage to your heating system. Our coracon® antifreeze products for heating systems offer you environmentally friendly and temperature-stable antifreeze concentrates based on glycols, corrosion inhibitors and stabilisers. They can be universally used as antifreeze, anticorrosive or as heat- or cold-transfer media in heating or cooling systems.

coracon® heating antifreeze provides safety and saves money
Thanks to our coracon® antifreeze products, you can turn off heating systems for a short time even when it freezes, without losing their functional efficiency. Temporarily used facilities such as gyms, holiday homes, churches, schools and venues can save significant amounts of energy costs.

coracon® HF 6: heating antifreeze

  • Environmentally friendly heat transfer and antifreeze agent for water heating systems
  • Can be used to protect against frost damage when heating system is switched off in commercial and private systems
  • Optimum corrosion protection for all metals used in the system
  • (also copper and aluminium)
  • Prevention of layer formation and deposits
  • Mixable with water and individually adjustable to the desired frost protection
  • Nitrite, phosphate and secondary amine free
  • No hazardous substances, no hazardous goods, no CMR substances

Download product sheet coracon® HF 6

Key data

  • Nitrite-free, phosphate-free, secondary amine-free, borate-free, silicate-free, free of 2-ethylhexanoic acid
  • Corrosion protection on OAT basis (Organic Acid Type)
  • Biodegradable
  • Colour: clear, slightly yellowish
  • Frost protection base: 1.2-propanediol
  • Specific weight: 1.05 g/ml (DIN 51757)
  • pH value (1:1 with neutral water): 7.5 -8.5 (ASTM-D 1287)
  • Thermal conductivity (at 20 °C): 0.22 W/m*K
  • Boiling point (°C):> 138 (ASTM-D 1120)
  • Flash point (°C): > 100 (ASTM-D 51758)
  • No dangerous goods - Water hazard class 1

Why professional antifreeze for heating and not any antifreeze for car radiators or windscreen wipers?
Although frost protection for car radiators or windscreen wipers from the DIY store is cheaper, you are dealing with a whole lot of problems that damage your heating and lead to unnecessary follow-up costs. On top of that, you're polluting the environment and putting your health at massive risk.

  • Wiping frost protection contains ethanol, which can be dangerously explosive when evaporating in the boiler room.
  • Radiator frost protection contains large quantities of monoethylene glycol and is classified as harmful to health.
  • Radiator antifreeze contains silicates that act like razor blades on the heating system when the pH value drops. Seals and pumps are successively destroyed.

It is therefore essential that you use a professional antifreeze for heating. Our coracon® antifreeze products for heating consist of an environmentally and material compatible antifreeze base and are free of silicates and borates.
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Why not just let the water out of the heater?
When the heater is emptied, oxygen enters the heating circuit and a certain amount of residual moisture remains. Both are extremely corrosion-promoting and damage the entire system. You will also be doing a lot of unnecessary work.
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What can you do for yourself?
If you want to be on the safe side, you can rely on our heating professionals. With a little craftsmanship, however, you can also fill our coracon® antifreeze products into your heating yourself. All you need is a filling pump such as the canister filling pump coracon® KAPU 5.
Important: Before filling, our frost protection for heating systems must be diluted 1:1 with water. This facilitates the effective distribution of the glycol contained in the heating circuit.
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Service Center

We can help quickly and competently.

Your contact: 
Hark Kemlein-Schiller
Head of Heat Transfer Fluids Competence Center
Phone: +49 (0) 89 899 369-130
E-mail: h.schiller@aqua-concept-gmbh.eu